JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Axial Load Performance of Circular CFT Columns with Concrete Encasement
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Axial Load Performance of Circular CFT Columns with Concrete Encasement
Lee, Ho Jun; Park, Hong Gun; Choi, In Rak;
  PDF(new window)
 Abstract
An experimental study was performed to investigate the axial-flexural load-carrying capacity of concrete-encased and-filled steel tube (CEFT) columns. To restrain local buckling of longitudinal bars and to prevent premature failure of the thin concrete encasement, the use of U-cross ties was proposed. Five eccentrically loaded columns were tested by monotonic compression. The test parameters were axial-load eccentricity, spacing of ties, and the use of concrete encasement. Although early cracking occurred in the thin concrete encasement, the maximum axial loads of the CEFT specimens generally agreed with the strengths predicted considering the full contribution of the concrete encasement. Further, due to the effect of the circular steel tube, the CEFT columns exhibited significant ductility. The applicability of current design codes to the CEFT columns was evaluated in terms of axial-flexural strength and flexural stiffness.
 Keywords
Concrete-encased and-filled tube;Circular CFT;Eccentric axial loading;Axial-flexural strength;Flexural stiffness;
 Language
Korean
 Cited by
 References
1.
임우영, 박홍근, 오정근, 김창수(2014) 현장타설 콘크리트채움 중공 PC기둥의 내진성능, 한국콘크리트학회논문집, 한국콘크리트학회, 제26권, 제4호, pp.35-46. Im, W.Y., Park, H.G., Oh, J.K., and Kim, C.S. (2014) Seismic Resistance of Cast-In-Place Concrete-Filled Hollow PC Columns, Journal of the Korea Concrete Institute, KCI, Vol.26, No.4, pp.35-46 (in Korean).

2.
박홍근, 이호준, 박성순, 김성배(2014) 콘크리트피복충전각형강관 기둥-보 접합부의 주기하중 실험, 한국강구조학회논문집, 한국강구조학회, 제26권, 제1호, pp.55-68. Park, H.G., Lee, H.J., Park, S.S., and Kim, S.B. (2014) Cyclic Loading Test for Beam-to-Column Connections of Concrete Encased CFT Column, Journal of Korean Society of Steel Construction, KSSC, Vol.26, No.1, pp.55-68 (in Korean).

3.
Park, H.G., Lee, H.J.. Choi, I.R., Kim, S.B., and Park, S.S. (2015) Concrete-Filled Steel Tube Columns Encased with Thin Precast Concrete, J. Struct. Eng., ASCE (on-line published).

4.
Xu, L. and Liu, Y.B. (2013) Concrete Filled Steel Tube Reinforced Concrete (CFSTRC) Columns Subjected to ISO-834 Standard Fire: Experiment, Advances in Structural Engineering, Vol.16, No.7, pp.1263-1282. crossref(new window)

5.
Matsui, C., Tsuda, K., and Mori, T. (1998) Limiting Width (Diameter)-Thickness Ratio of Tubes of Composite Steel Tube and Concrete Columns with Encased Type Section, J. Struct. Constr. Eng., AIJ, Vol.503, pp.157-163 (in Japanese).

6.
Nakamura, Y., Matsuo, A., and Kamiura, K. (1999) Ultimate Strength and Plastic Deformation Capacity of CFT Columns with Covering RC Considering Material Combination, AIJ J. Technol. Des., AIJ, No.7, pp.39-44 (in Japanese).

7.
Ueura, K., Nakamura, Y., and Matsuo, A. (1999) Ultimate Strength and Plastic Deformation Capacity of CFT Columns with Covering RC Using High-Strength Materials, Res. Rep. Chuugoku Branch, AIJ, Vol.22, pp.189-192 (in Japanese).

8.
Han L.H., Liao, F.Y., Tao, Z., and Hong, Z. (2009) Performance of Concrete Filled Steel Tube Reinforced Concrete Columns Subjected to Cyclic Bending, J. Constr. Steel Res., ELSEVIER, Vol.65, No.8, pp.1607-1616. crossref(new window)

9.
AIJ(Architectural Institute of Japan) (2014) Standard for Structural Calculation of Steel Reinforced Concrete Structures, Tokyo (in Japanese).

10.
AISC(2010) Specification for Structural Steel Building, ANSI/AISC 360-10, Chicago.

11.
Park, R. (1988) Ductility Evaluation from Laboratory and Analytical Testing, Proc., 9th World Conf. on Earthquake Engineering, Vol.8, IAEE, Tokyo, pp.605-616.

12.
Fujimoto, T., Mukai, A., Nishiyama, I., and Sakino, K. (2004) Behavior of Eccentrically Loaded Concrete-Filled Steel Tubular Columns, J. Struct. Eng., ASCE, Vol.130, No.2, pp.203-212. crossref(new window)

13.
Cusson, D. and Paultre, P. (1995) Stress-Strain Model for Confined High-Strength Concrete, J. Struct. Eng., ASCE, Vol.121, No.3, pp.468-477. crossref(new window)

14.
Legeron, F. and Paultre, P. (2003) Uniaxial Confinement Model for Normal-and High-Strength Concrete Columns, J. Struct. Eng., ASCE, Vol.129, No.2, pp.241-252. crossref(new window)

15.
Sheikh, S.A., Shah, D.V., and Khoury, S.S. (1994) Confinement of High-Strength Concrete Columns, ACI Struct. J., Vol.91, No.1, pp.100-111.

16.
Kim, C.S., Park, H.G., Chung, K.S., and Choi, I.R. (2014) Eccentric Axial Load Testing for Concrete-Encased Steel Columns Using 800 MPa Steel and 100 MPa Concrete, J. Struct. Eng., ASCE, Vol.138, No.8, pp.1019-1031.

17.
Chen, C.C. and Lin, N.J. (2006) Analytical Model for Predicting Axial Capacity and Behavior of Concrete Encased Steel Composite Stub Columns, J. Constr. Steel Res., ELSEVIER, Vol.62, No.5, pp.424-433. crossref(new window)

18.
Morino, S., Matsui, C., and Yoshikai, S. (1986) Local Buckling of Steel Elements in Concrete Encased Columns, Proc., Pacific Struct. Steel Conf., PSSC, Auckland, New Zealand, Vol.2, pp.319-335.

19.
CEN(European Committee for Standardization) (2004) Design of Composite Steel and Concrete Structures, Eurocode 4, Brussels.

20.
ACI(American Concrete Institute) (2014) Building Code Requirements for Structural Concrete, ACI 318-14, Farmington Hills, MI.

21.
Mirza, S.A. and Tikka, T.K. (1999) Flexural Stiffness of Composite Columns Subjected to Major Axis Bending, ACI Struct. J., Vol.96, No.1, pp.19-28.